So the C140 needed some minor surgery - one of the plastic oil crossovers blew out it’s bottom, which lead to a quite loud lifter and lower than usual oil pressure. Naturally I replaced all of them while in there, as well as timing chain guides. To be honest, I didn’t think they would fail at low mileage, babied engines so soon, but it wasn’t a bad job. Maybe 4h with just regular hand tools. Somehow M119 engines are quite pretty.